Sinusoid propeller.



-1. J. MDDCGK. y SINUSOID PBOPBLLER.

APPLICATION FLBD DEU. 31, 1910.

Patented Feb. M, 1913.

2 SHEETS-SHEET 1.

' /1 TTOR/VE V 8 I. J. PADDOCK.

SINUSOID PROPBLLER.

APPLICATION FILED 11110.31, 1910.

Patented Feb.11,1913.

w/mfssfs; I

IBA PADDOCK, 0F CITY, NEBRASKA.

s'INUsoI-D'v rnorELLEn To all whom it may concern:

Be it'lmown that I, IRA J. PADDocK, a citizen? of the United States, anda resident of Nebraska City, in the county of Otoe and State ofNebraska, have made certain new and useful Improvements in` SinusoidPropellers, of which the following is a specifica-4 tion. I'

My invention relates to improvements in propellers, and it consists inthe combinations, constructions and arrangements herein described andclaimed.

My invention is based upon the fact thatI when a iexible surface, suchas a sheet of fabric, is held at one edge in a current of air or othermedium which is traveling in a direction parallel to the normal plane ofthe sheet, the latter will have imparted to it a series of wave-likemotions. These waves follow each other in rapid succession and have theform of asine curve. Parts of the sheetwill be moving upwardly, andother parts ofl the -sheet will be 'moving downwardly.

An object of, my invention is to provide a device bv mea of which thewave-like movements of tl sheet may be utilized for generating power.

A further' object lof my invention is to provide a novel form ofmechanism for transmitting power to a common shaft.

n Other ob]ects and advantages will appear' in the followingspecification, and the novel features of the device will beparticularlypointed out in they appended claims.

My invention is illustrated in the accompanying drawings, in which-Flgure 1 is a side view of the device, and Fig. '2 is a perspective viewshowing lthe position of the sheets when in operation.

Referring now particularly to Fig. 1, it will be seen that I haveprovided a main frame consisting ofthe uprights land 2, a bttom member3, and a top member 4. Disposed in the bottom and top members 3 and 4are a series ofslidable rods 5 and 6. These rods are arranged in pairsas .will be seen. The upper ends of vthe rods 5 are connectedby pitmen 7-to a common crank shaft 8which is carriedby bearings 9 secured to theframe member 4. As will be seen from the drawing, the adjacentpitmen 7are connected to the crank shaft at points 90o apart. The rods 6 are.connectedby pitmen 10 with a co'mmon crank shaft 11 which is carriad bysupports l2fsecured/to Vthe frame member 3. As in the case of the pitmen7 the adjacent pitmen 10 are connected to thecrank shaft 11 atl points90 apart.

Secured to the'frame member 1 is a series of sheets 13 and 14. In Fig-1,which is a side view of the device, the edges of these sheets are seen.The ends of the sheets opposite the frame member 1 are. secured to theframe member 2 bya series of springs. Each of the sheets 13 is securedat equalfdistances apart to the rods 6, while the sheets- 14" aresecured to the rods', as shown in Fig. 1.

Fro theforegoing description of the various arts of the device, theoperation thereo may be readily understood.

It will be understood that the op osite ends of the sheets are in asimilar ame and that the two frames are connected together. If now acurrent of air should m ove through the device in the directionindlcated by the. arrows in Fig. 1, the sheets will be given asinusoidal movement like that shown in` Fig. 2. In this figure any givensheets 13k and 14 are nearest together at the points at fw they areseparated from veach other; at y they are farthest apart. It will beunderstood that this view shows the position of the sheets at any givenmoment of time, for in accordance with the sinusoidal movement thepoints may move so as -to be the maximum distance from each other in anygiven sheets 13 and 14. In

- rods 5 and 6 which are connected at the ends ofthe sheets as stated.These rods im- "part motion to the shaftsv 8 and 11 and the powerderived therefrom may be used for any useful purpose.

The propeller may be used for driving purposes as well as for beingdriven by air currents. With the propeller as described, the rotation pfthe shafts llfand 8 would cause a reciprocation of the rods 5 and 6 soas to give the sheets 13 and 14 a 'sinusoidal movement.

Referring again to Fig. 2, it will be seen l speeiacaa'on of Lettersraient. Patented Feb, 11, wf. Appunti@ med ,December a1, 1910. serialno. 600,220.

that air may be entrained at one end of the device, as for instance, atthe left hand sfde of the ligure, and may be forced in the directionindicated by the arrow somewhat in the manner of swallowing. This wouldtend to drive any device such as an aeroplane, forwardly in. thedirection opposite to that in 'which the air is forced.

It is obvious that this same device might x be used mother-connectionsand with other i media than air. The same rinciple might be applied to astructure deslgned to propel a boat.v Inthe latter instance, thereaction afforded by the rearward drive of. the Water would propelthe.boat forwardly. I am aware that other devices based on the same generalprinciple might be made,

but I consider as my own all such modifications as fairly fall withinthe spirit 4 and scope of the invention.'

1. In a propelling device, a frame, a series of sheets loosely carriedthereby, means. for imparting a sinusoidal wave movement lto each sheet,the sinusoidal wave movement of one sheet ,di'ering in phase by half aperiod from the wave movement of the adjacent sheet-on either side.

2. In apro elling device, va frame, a series of sheets oosely carriedthereby, means for imparting a sinusoidal wave movement to each sheet,the sinusoidal wave movement of one sheet vdiil'ering in phase by half aperiod from the wave movement of the adjacent sheet on 'either side, andeach sheet co-v operating with the sheets on either side or exerting apropelling force in ries of sheets looselycarried lin said lframeandl'langed to receive a *sinusoidalmovement, a'fseries of rodsjorriedbysaid frame,

necting each rod with one of ysaid lcrank shafts for imparting movementAto the latter.

4. In av propelling device, a frame, a seriesof flexible sheets securedto said frame vat one end, thetopposite end of saidV sheets beingsecu-red to the frame 4by means "ofsprngS, a shaft carried by said"frame on eachlside thereof, a series of pairs of reciprocating rods,each rod oi a pair being connected to alternate sheets, and meansVconnected to each of said rods for imparting movementto one of saidshafts.

5. In apro elling device, a frame, a series of sheets oosely carriedthereby, means for'imparting a sinusoidal wave movementY to each sheet,and each sheet coperating,N

with the adjacent sheets on each side thereof for exerting a propellingforce in the same direction.

.- l IRA J. PADDOCK.

`V-Vitnesses: i

WILSON,

y.. B. R. ALLnN.

